void MP4File::MakeIsmaCompliant(bool addIsmaComplianceSdp)
{
ProtectWriteOperation("MP4MakeIsmaCompliant");
if (m_useIsma) {
// already done
return;
}
// find first audio and/or video tracks
MP4TrackId audioTrackId = MP4_INVALID_TRACK_ID;
try {
audioTrackId = FindTrackId(0, MP4_AUDIO_TRACK_TYPE);
}
catch (MP4Error* e) {
delete e;
}
MP4TrackId videoTrackId = MP4_INVALID_TRACK_ID;
try {
videoTrackId = FindTrackId(0, MP4_VIDEO_TRACK_TYPE);
}
catch (MP4Error* e) {
delete e;
}
const char *audio_media_data_name, *video_media_data_name;
audio_media_data_name = MP4GetTrackMediaDataName(this, audioTrackId);
if (!(ATOMID(audio_media_data_name) == ATOMID("mp4a") ||
ATOMID(audio_media_data_name) == ATOMID("enca"))) {
VERBOSE_ERROR(m_verbosity,
printf("MakeIsmaCompliant:can't make ISMA compliant when file contains an %s track\n", audio_media_data_name);
);
void MP4File::MakeIsmaCompliant(bool addIsmaComplianceSdp)
{
ProtectWriteOperation("MP4MakeIsmaCompliant");
if (m_useIsma) {
// already done
return;
}
m_useIsma = true;
// find first audio and/or video tracks
MP4TrackId audioTrackId = MP4_INVALID_TRACK_ID;
try {
audioTrackId = FindTrackId(0, MP4_AUDIO_TRACK_TYPE);
}
catch (MP4Error* e) {
delete e;
}
MP4TrackId videoTrackId = MP4_INVALID_TRACK_ID;
try {
videoTrackId = FindTrackId(0, MP4_VIDEO_TRACK_TYPE);
}
catch (MP4Error* e) {
delete e;
}
u_int64_t fileMsDuration =
ConvertFromMovieDuration(GetDuration(), MP4_MSECS_TIME_SCALE);
// delete any existing OD track
if (m_odTrackId != MP4_INVALID_TRACK_ID) {
DeleteTrack(m_odTrackId);
}
AddODTrack();
SetODProfileLevel(0xFF);
if (audioTrackId != MP4_INVALID_TRACK_ID) {
AddTrackToOd(audioTrackId);
}
if (videoTrackId != MP4_INVALID_TRACK_ID) {
AddTrackToOd(videoTrackId);
}
// delete any existing scene track
MP4TrackId sceneTrackId = MP4_INVALID_TRACK_ID;
try {
sceneTrackId = FindTrackId(0, MP4_SCENE_TRACK_TYPE);
}
catch (MP4Error *e) {
delete e;
}
if (sceneTrackId != MP4_INVALID_TRACK_ID) {
DeleteTrack(sceneTrackId);
}
// add scene track
sceneTrackId = AddSceneTrack();
SetSceneProfileLevel(0xFF);
SetGraphicsProfileLevel(0xFF);
SetTrackIntegerProperty(sceneTrackId,
"mdia.minf.stbl.stsd.mp4s.esds.decConfigDescr.objectTypeId",
MP4SystemsV2ObjectType);
SetTrackESConfiguration(sceneTrackId,
BifsV2Config, sizeof(BifsV2Config));
u_int8_t* pBytes = NULL;
u_int64_t numBytes = 0;
// write OD Update Command
CreateIsmaODUpdateCommandFromFileForFile(
m_odTrackId,
audioTrackId,
videoTrackId,
&pBytes,
&numBytes);
WriteSample(m_odTrackId, pBytes, numBytes, fileMsDuration);
MP4Free(pBytes);
pBytes = NULL;
// write BIFS Scene Replace Command
CreateIsmaSceneCommand(
MP4_IS_VALID_TRACK_ID(audioTrackId),
MP4_IS_VALID_TRACK_ID(videoTrackId),
&pBytes,
&numBytes);
WriteSample(sceneTrackId, pBytes, numBytes, fileMsDuration);
MP4Free(pBytes);
pBytes = NULL;
// add session level sdp
CreateIsmaIodFromFile(
m_odTrackId,
sceneTrackId,
audioTrackId,
videoTrackId,
&pBytes,
&numBytes);
char* iodBase64 = MP4ToBase64(pBytes, numBytes);
char* sdpBuf = (char*)MP4Calloc(strlen(iodBase64) + 256);
if (addIsmaComplianceSdp) {
strcpy(sdpBuf, "a=isma-compliance:1,1.0,1\015\012");
}
sprintf(&sdpBuf[strlen(sdpBuf)],
"a=mpeg4-iod: \042data:application/mpeg4-iod;base64,%s\042\015\012",
iodBase64);
SetSessionSdp(sdpBuf);
VERBOSE_ISMA(GetVerbosity(),
printf("IOD SDP = %s\n", sdpBuf));
MP4Free(iodBase64);
iodBase64 = NULL;
MP4Free(pBytes);
pBytes = NULL;
MP4Free(sdpBuf);
sdpBuf = NULL;
}
